Why do scientists sometimes discuss the possibility of silicon as a basic element for life? A. Silicon has an outer shell of electrons that is similar to carbon.
B. Silicon is similar in atomic mass to carbon.
C. Silicon has an inner shell of electrons that is similar to carbon.
D. Silicon is similar in abundance to carbon.

Matt is driving down 7th street. he drives 150 meters in 18 sec. assuming he doesn’t slow down or speed up, what is his speed?

Which type of wave can travel without a medium

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?